what is the romney camp up to? >>reporter: they are headed to denver with a big rally at wings over the rockies air and space museum. what we will see tonight is a shift in strategy. the governor's attempts at framing this as a referendum on president obama have not been working. he now is saying this is a choice for two very different futures for america. he is saying that his choice is one where a smaller government would have facility private enterprise to grow the economy. the other, his version of president obama's view is that government is still in control of everything. the challenge for governor romney and the debate on wednesday is going to be fully articulate his vision for america's future to the largest audience of his political career. >> we need to give the american people the choice we are offering. that is what we are offering. we owe the country a very clear choice of a different future. we can have a dynamic growing economy that produces opportunity or we can have a stagnant opportunity that fost